API/APICast.h

   1 /*
   2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef APICast_h
  27 #define APICast_h
  28
  29 #include "JSAPIValueWrapper.h"
  30 #include "JSGlobalObject.h"
  31 #include "JSValue.h"
  32 #include <wtf/UnusedParam.h>
  33
  34 namespace JSC {
  35     class ExecState;
  36     class PropertyNameArray;
  37     class JSGlobalData;
  38     class JSObject;
  39     class JSValue;
  40 }
  41
  42 typedef const struct OpaqueJSContextGroup* JSContextGroupRef;
  43 typedef const struct OpaqueJSContext* JSContextRef;
  44 typedef struct OpaqueJSContext* JSGlobalContextRef;
  45 typedef struct OpaqueJSPropertyNameAccumulator* JSPropertyNameAccumulatorRef;
  46 typedef const struct OpaqueJSValue* JSValueRef;
  47 typedef struct OpaqueJSValue* JSObjectRef;
  48
  49 /* Opaque typing convenience methods */
  50
  51 inline JSC::ExecState* toJS(JSContextRef c)
  52 {
  53     ASSERT(c);
  54     return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));
  55 }
  56
  57 inline JSC::ExecState* toJS(JSGlobalContextRef c)
  58 {
  59     ASSERT(c);
  60     return reinterpret_cast<JSC::ExecState*>(c);
  61 }
  62
  63 inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)
  64 {
  65     ASSERT_UNUSED(exec, exec);
  66     ASSERT(v);
  67 #if USE(JSVALUE32_64)
  68     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  69     if (!jsCell)
  70         return JSC::JSValue();
  71     if (jsCell->isAPIValueWrapper())
  72         return JSC::jsCast<JSC::JSAPIValueWrapper*>(jsCell)->value();
  73     return jsCell;
  74 #else
  75     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  76 #endif
  77 }
  78
  79 inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)
  80 {
  81     ASSERT_UNUSED(exec, exec);
  82     ASSERT(v);
  83 #if USE(JSVALUE32_64)
  84     JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));
  85     if (!jsCell)
  86         return JSC::JSValue();
  87     return jsCell;
  88 #else
  89     return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));
  90 #endif
  91 }
  92
  93 inline JSC::JSObject* toJS(JSObjectRef o)
  94 {
  95     return reinterpret_cast<JSC::JSObject*>(o);
  96 }
  97
  98 inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)
  99 {
 100     return reinterpret_cast<JSC::PropertyNameArray*>(a);
 101 }
 102
 103 inline JSC::JSGlobalData* toJS(JSContextGroupRef g)
 104 {
 105     return reinterpret_cast<JSC::JSGlobalData*>(const_cast<OpaqueJSContextGroup*>(g));
 106 }
 107
 108 inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)
 109 {
 110 #if USE(JSVALUE32_64)
 111     if (!v)
 112         return 0;
 113     if (!v.isCell())
 114         return reinterpret_cast<JSValueRef>(JSC::jsAPIValueWrapper(exec, v).asCell());
 115     return reinterpret_cast<JSValueRef>(v.asCell());
 116 #else
 117     UNUSED_PARAM(exec);
 118     return reinterpret_cast<JSValueRef>(JSC::JSValue::encode(v));
 119 #endif
 120 }
 121
 122 inline JSObjectRef toRef(JSC::JSObject* o)
 123 {
 124     return reinterpret_cast<JSObjectRef>(o);
 125 }
 126
 127 inline JSObjectRef toRef(const JSC::JSObject* o)
 128 {
 129     return reinterpret_cast<JSObjectRef>(const_cast<JSC::JSObject*>(o));
 130 }
 131
 132 inline JSContextRef toRef(JSC::ExecState* e)
 133 {
 134     return reinterpret_cast<JSContextRef>(e);
 135 }
 136
 137 inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)
 138 {
 139     ASSERT(e == e->lexicalGlobalObject()->globalExec());
 140     return reinterpret_cast<JSGlobalContextRef>(e);
 141 }
 142
 143 inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)
 144 {
 145     return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);
 146 }
 147
 148 inline JSContextGroupRef toRef(JSC::JSGlobalData* g)
 149 {
 150     return reinterpret_cast<JSContextGroupRef>(g);
 151 }
 152
 153 #endif // APICast_h